Glassware.



0. A.v MYGATT.

GLASSWARB.

APPLICATION FILED mums, 1907.

Patented Apr. 21, 19%

I N VENT 0R plaque,

OTIS A. mesmermw YORK, N.

"emsswenn.

Specification otiLetters Patent.

Patented Apr. 21, 1914.

Application .filed June 25, 1907. Serial No. 380,763.

To all whom it may concern:

Be it known that I, OTIS A. MYGATT, a citizen of the United States, residing in N eW. York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Glassware, of which cation.

The object of my invention is to produce a 11011 iridescent coloring in glassware.

The invention consists in the arrangement and disposition of the prisms [uponthe opposite sides of the walls of the glassware whereby iridescent or spectrumforming iridescent effects are produced, the details of which will first be fully described and the patenta-ble features thereinset forth in the claims.

In the drawings: Figure l represents a side elevation of a tumbler to which I have applied my improvements. Fig. 2 is a top view. Fi 3 is a similar to view of the modified form. Fig. 4 is a an view .of a plate or reflector em dying a further mo ification of'my invention.

In'Fig. 1 is shown a tumbler, for example, having a seriesof 140 prisms running longitudinally upon its outer side, and upon its inner side opposite thereto a similarly disposed series of prisms of )0. The angle through the body or wall of the glass between the 140 prism on one side and the 90 prism upon the other being 65.

n Fig. 3, the outer prisms are 120 and the inner prisms are the same. The angle between the outer and inner prisms, which are opposite each other, is 60 across the body or wall of the glass.

In Fig. 4 the series of outer .radial prisms are 90 and the series of inner radial prisms are 140, making an angle between the inner and outer risms of 65.

I have upon the wall or body of a glass opposite the following is a specifiof the sides of those surfaces ound that where prisms are used each other so as to present acros's the body of the glass air-angle of 60 01765 degrees, that the white raysof-light arebrok'en up, into'colors of the spectrum andri ch iridescent effects are produced. This critical angle varies around 60 or 65, depending upon the refractive qualityfof the glass batch emplo edfin formin'gthe glassware. The higher t erefracting power of the glass batch used, the smaller the angle necessary to break up the white light inthe colors of the spectrum-is required. V. V

I claim:

1. Glassware having prismatic surfaces upon both sides of the .glass body, the angle 0 the sides of-those surfaces opposite each other constituting spectrum forming angles.

' 2'. Glassware having prismatic surfaces upon both sides, the angle of the sides of those surfaces opposite each other form.- ing angles of about 60. Y

3. A trans arent glass inclosure having prismatic sur aces upon both sides, the angle opposite each other constituting spectrum-forming angles.

4. Inclosures having prismatic surfaces upon both sides of the glass of the sides of those surfaces opposite each other constituting spectrum forming angles. 5. An inclosure having rismatic surfaces upon both sides, the ang e of the sides of those surfaces opposite each other forming angles of about 60. v

6. An inclosure for artificial lights having prisms upon both surfaces lying in planes passingthrough the inclosure axis, the sides of the prisms on the outer-surface forming an les of about 60 degrees with the sides of the prisms on the inner surface.

ROBERT KELLY, Jr.,

E. P. RAY.

body, the angle] 

